High-temperature gas valve



1951 F. H. JOHNSON HIGH-TEMPERATURE GAS VALVE Filed Jan. 20, 1948 Fred HJa/zrzsorz Patented Nov, 20, 1951 UNITED STATES PATENT OFFICE UnitedStates Steel Com New Jersey I pony, a corporation of Application January20, ms, Serial No. 3.329

8 Claims. (01. 251-159) This invention relates to valves for controllingflow of high temperature gases and particularly to water cooled closuredisks embodied in such valves.

An object of the invention is to provide gas valve closure disks havingimproved and highly efficient means for circulating cooling watertherethrough. V

A further object of the invention is to provide improved gas valveclosure disks of metal construction in which the exposed faces areinsulated with refractory material for protection against hightemperatures.

A further object of the invention is to provide improved valve closuredisks of simplified construction having continuously water cooledsealing means for engagement with valve seats.

In accomplishing these and other objects of the present invention, Ihave provided improved details of structure. a preferred form of whichis shown in the accompanying drawing, wherein:

Figure l is a vertical sectional view through a gas valve having aclosure disk embodying features of the present invention.

Figure 2 is an enlarged vertical sectional view of a portion of theclosure disk shown in Figure 1.

Figure 3 is a top plan view with parts cut away, illustrating a portionof the improved closure disk.

Referring more in detail to the drawing:

In Figure 1 there is shown at It a portion of a valve body adapted tocontrol flow of hot gases, as for example the hot air blast to ametallurgical blast furnace. The body contains an annular seat [2. Saidseat and body may be of any conventional design and hence are not shownnor described in greater detail.

A closure disk l3, constructed in accordance with the present invention,is cooperable with the upper face of seat I! to close the valve againstfiow of gases. Disk I 3 is fixed to the lower end of a stem ll which maybe raised and lowered by any suitable external operating mechanism, notshown.

As best shown in Figure 2, disk I3 comprises a hollow annular; pipe l lwhich extends around the circumferenceiof-the disk and is tangentiallyengag'eable iwithuseat -li to seal the valve. Said pipe has a'circumerential opening in its upper region, opposite siting region. A lowerdome shaped plate Ilisjoinedto the inner circumferential edge oftheiope'ning in the pipe, and an upper cone shaped plate I1 is joined tothe outer circumferential edge. The lower end of stem I4 is Joined toupper plate I'I. Stem I4 is tubular and carries a concentric water inlettube It which terminates slightly above plate It. A central dome shapedbaiile I9 is fixed to the lower end of tube II and at its circumferencecarries a circular flange III which extends downwardly within pip'eglfithrough the circumferential opening is defines water inlet and dischargeorifices.

Figure 3, a plurality of radial vanes II extend out from tube I8 betweenbaille l9 and plate l6, and similar radial vanes 22 extend'betweenbaille l9 and plate l1. Both sets of radial varies terminateapproximately in line with the circumferential edge of plate II. Theradia-l vanes function both to position dome shaped baille it betweenplates I 6 and I! and to dirct'flowof cooling water through the disk.

For cooling the valve water is introduced through tube It and flowsthrough the passages which are defined by lower plate It, baffle I9 andradialvanes 2| and then into pipe Ill. The water is discharged from pipeI 5 via the passages which are defined by upper plate l1, baffle l9 andradial vanes and then through stem H. The crosssectional area of tube Itis at least as great as the total inlet orifice area from the lowerpassages into pipe IS, in order not to retard water circulation.Preferably the areas of the inlet and discharge orifices of pipe it aresubstantially equal. The flow of water thus continuously cools pipe I!throughout its circumference.

A dome shaped insulation block 24 of refractory material is fixed to theunderface of plate It. A conical insulation block 25 of similarrefractory material is fixed to the upper face of plate I'I. Preferablypipe l5 carries external circumferential wings 26 and 21 for retainingsaid insulation blocks.

When the valve disk is seated against seat l2, pipe 15 may flex slightlyat its juncture with lower plate IS-to furnish a close fit against theseat. The line of juncture may be necked-down" slightly as indicated at28 in Figure 2 to assist such flexing. However, any such flexing mustnot be of suflicient magnitude to crack insulation block 24. 7

From the foregoing description, it is seen that I have provided animproved closure disk for valves adapted to control the fiow of hightemperature gases. The valve disk has a highly efficient watercirculating system in which all metal parts are continuously cooled andthe exposed metal parts are protected insofar as possible by refractoryinsulation. The sealing means shown provides a complete seal againstpassage of gases 5; when the valve is closed.

the circumference of the disk and engageable with said seat and having acircumferential opening opposite its seating region, a pair of spacedplates joined to said pipe at theedges of said opening, one of saidplates being joined to said stem, a tube carried within the bore of saidstem, and a continuous baffle fixed to the end of said tube and disposedin spaced relation between said plates and having a continuouscircumferential flange extending into said pipe through said opening,said baffle directing circulation of cooling water through said pipeuniformly throughout its circumference.

2. In a valve, a body, an annular seat in said body, a closure diskcooperable with said seat to close the valve, and a tubular stem joinedto said disk for operating the valve, said closure disk including anannular pipe extending around the circumference of the disk andengageable with said seat and having a circumferential opening oppositeits seating region, a pair of spaced plates joined to said pipe at theedges of said opening, one of said plates being joined to said stem, atube carried within the bore of said stem, a baffle fixed to the end ofsaid tube and disposed in spaced relation between said plates and havinga circumferential flange extending into said pipe through said opening,and a plurality of radial vanes extending outwardly from said tube inthe spaces between said bafile and said plates, said baifie andsaidvanes directing circulation of cooling water through said pipe.

3. In a valve, a body, an annular seat in said body, a closure diskcooperable with said seat to close the valve, and a tubular stem joinedto said disk for operating the valve, said closure disk including anannular pipe extending around the circumference of the disk andengageable with said seat and having a circumferential opening oppositeits seating region, a pair of spaced plates joined to said pipe at theedges of said opening, one of said plates being joined to said stem, atube carried within the bore of said stem, a continuous baffle fixed tothe end of said tube and disposed in spaced relation between said platesand having a continuous circumferential flange extending into said pipethrough said opening, said flange directing circulation of cooling waterthrough said pipe uniformly throughout its circumference, and insulationblocks of refractory material fixed to the outer faces of said plates.

4. In a valve, a body, an annular seat in said body, a closure diskcooperable with said seat to close the valve, and a tubular stem joinedto said disk for operating the valve, said closure disk including anannular pipe extending around the circumference of the disk andengageable with said seat and having a circumferential opening oppositeits seating region, a pair of spaced plates joined to said pipe at theedges of said opening, one of said plates being joined to said stem, 9.

water inlet tube carried within the bore of said stem, a baflie fixed tothe end of said tube and disposed in spaced relation between said platesand having a circumferential flange extending uito said pipe throughsaid opening delinlng water inlet and discharge orifices, and aplurality of radial vanes extending outwardly from said tube in thespaces between said Dame and said plates and positioning said baiiie,said heme and said vanes directing circulation of cooling water throughsaid pipe and discharging through said stem, the cross-sectional area orsaid water inlet tube being at least as great as the total inlet orificearea to said annular pipe.

b. in a valve, a bouy, an annular seat in said body, a closure diskcooperable with said seat to close the valve, and a tubular stem Joinedto said disk for operating the valve, said closure disk including anannular pipe extending around the circumlei'ence OI the disk andengageable with Sula Seat 4110. having a cll'tulilitl'ciltldl openingopposite its seating region, a pair of spaced plates oined to said pipeat tne edges or said opening, one of said plates being joined to saidstem, a tune carried within the bore of said stem, a oaiiie fixed to theend of said tube and disposed in spaced relation between said plates andhaving a circumferential flange extending into said pipe through saidopening defining water inlet and discharge orifices, and a plurality ofradial vanes extending outwardly from said tube in tne spaces betweensaid battle and said plates and positioning said baflle, said baflie andsaid vanes directing circulation of cooling water through said pipe, theline of juncture between said pipe and one of said plates beingnecked-down slightly to permit flexing.

6. In a valve, a body, an annular seat in said body, a closure diskcooperable with said seat to close the valve, and a tubular stem joinedto said disk for operating the valve, said closure disk including anannular pipe extending around the circumference of the disk andengageable with said seat and having a circumferential opening oppositeits seating region, a pair of spaced plates joined to said pipe at theedges of said opening, one of said plates being joined to said stem, awater inlet tube carried within the bore of said stem, a baflie fixed tothe end of said tube and disposed in spaced relation between said platesand having a circumferential flange extending into said pipe throughsaid opening defining water inlet and discharge orifices, and aplurality of radial vanes extending outwardly from said tube in thespaces between said bailie and said plates and positioning said baflie,said bafile and said vanes directing circulation of cooling waterthrough said pipe and discharging through said stem, the cross-sectionalarea of said water inlet tube being at least as great as the total inletorifice area to said annular pipe, the line of juncture between saidpipe and one of said plates being necked-down slightly to permitflexing.

7. A valve disk and. stem combination comprising an annular pipeextending around the circumference of the disk and having a seatingregion which is adapted to engage a valve seat and a circumferentialopening opposite its seating region, a pair of spaced plates joined tosaid pipe at the edges of said opening, the stem being tubular and oneof said plates being joined thereto, a tube carried within the bore ofthe stem, and a continuous baflle fixed to the end of said tube anddisposed in spaced relation between said plates and having a continuouscircumferential flange extending into said pipe through said opening,said bafiie directing circulation of cooling water through said pipeuniformly throughout its circumference.

8. A valve disk and stem combination comprising an annular pipeextending around the circumierence of the disk and having a seatingregion which is adapted to engage a valve seat and a circumferentialopening opposite its seating region, a pair of spaced plates joined tosaid pipe at the edges of said opening, the stem being tubular and oneof said plates being joined thereto, a tube carried withinthe bore ofthe stem, a baflie fixed to the end of said tube and disposed in spacedrelation between said plates and having a circumferential flangeextending into said pipe through said opening, and a plurality of radialvanes extending outwardly from said tube in the spaces between saidbattle and said plates, said baflie and said vanes directing circulationof cooling water through said pipe.

FRED H. JOHNSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 267,234 Long Nov. 7, 1882 548,636Fuller Oct. 29, 1895 659,805 Baker Oct. 16, 1900 723,582 Byrnes Mar. 24,1903 997,461 McCarthy July 11, 1911 1,323,328 Slick Dec. 2, 19191,873,119 Griswold Aug. 23, 1932 1,953,611 Jardine Apr. 3, 19342,204,724 Cope June 18, 1940 2,446,196 Sitney Aug. 3, 1948

